In Itinere: European Cities and the Birth of Modern Scientific Philosophy

Thus Spoke Zarathustra

The Brentano Puzzle

Many Lives, Many Masters: The True Story of a Prominent Psychiatrist, His Young Patient, and the Past-Life Therapy That Changed Both Their Lives

Why Materialism Is Baloney: How True Skeptics Know There Is No Death and Fathom Answers to life, the Universe, and Everything

Theory and Applications of Ontology: Philosophical Perspectives

Finite and Infinite Games

New Research on the Philosophy of Nicolai Hartmann

The I AM Discourses

Tarot Made Simple (How To Read Tarot Cards)

Polish Scientific Philosophy: The Lvov-Warsaw School

Irreducible: Consciousness, Life, Computers, and Human Nature

Theory and Applications of Ontology: Computer Applications

Buddha and Prince Siddhartha Buddha

The Philosophy of Nicolai Hartmann

My Son and the Afterlife: Conversations from the Other Side